Stopped overwriting emmet keymaps, except for the ones we need.
#1281 'cmd-d' in the js panel now deletes the current line.
#1281 Made it work for Windows.
Merge branch 'master' into fix/1281-javascript-cmd-l
Tidy up: remove old commented code
Merge pull request #1283 from jsbin/fix/1281-javascript-cmd-l

Stopped overwriting emmet keymaps, except for the ones we need.